import pygame.font
from pygame.sprite import Group
from ship import Ship

class Scoreboard():
    """ A class to report scoring information. """
    
    def __init__(self,ai_settings, screen, stats):
        """ Initialize scorekeeping attribute. """
        self.screen = screen
        self.screen_rect = screen.get_rect()
        self.ai_settings = ai_settings
        self.stats = stats
        
        # Font settings for scoring information.
        self.text_color = (30,30,30)
        self.font = pygame.font.SysFont(None, 48)
        
        # Prepare the initial score image.
        self.prep_score()
        self.prep_high_score()
        self.prep_level()
        self.prep_ships()
        
    def prep_score(self):
        """ Ture the score into a rendered image. """
        # To set the score nearest 10,1000,10000 format
        rounded_score = int(round(self.stats.score,-1))
        # A comma is to print the number at 10,000,0000 format
        score_str = "{:,}".format(rounded_score)
        
        self.score_image = self.font.render(score_str, True, self.text_color,
                                            self.ai_settings.bg_color)
        
        # Display the scoreboard at the top right of the screen.
        self.score_rect = self.score_image.get_rect()
        self.score_rect.right = self.screen_rect.right - 20
        self.score_rect.top = 20
    
    def prep_high_score(self):
        """ Turn the score into a rendered image. """
        # To set the score nearest 10,1000,10000 format
        rounded_score = int(round(self.stats.high_score,-1))
        # A comma is to print the number at 10,000,0000 format
        score_str = "{:,}".format(rounded_score)
        
        self.high_score_image = self.font.render(
                                            score_str, True, self.text_color,
                                            self.ai_settings.bg_color)
        
        # Display the scoreboard at the top right of the screen.
        self.high_score_rect = self.score_image.get_rect()
        self.high_score_rect.centerx = self.screen_rect.centerx
        self.high_score_rect.top = 20
    
    def prep_level(self):
        """ Turn the score into a rendered image. """
        
        self.level_image = self.font.render(
                                            str(self.stats.level), True, 
                                            self.text_color,
                                            self.ai_settings.bg_color
                                            )
        
        # Display the scoreboard at the top right of the screen.
        self.level_rect = self.level_image.get_rect()
        self.level_rect.right = self.screen_rect.right -20
        self.level_rect.top = self.score_rect.bottom + 10
    
    def prep_ships(self):
        """ Show how many ships are left. """
        self.ships = Group()
        for ship_number in range(self.stats.ships_left):
            ship = Ship(self.screen, self.ai_settings,)
            ship.rect.x = 10 + ship_number*ship.rect.width
            ship.rect.y = 10
            self.ships.add(ship)
    
    def show_score(self):
        """ Draw score to the screen. """
        self.screen.blit(self.score_image, self.score_rect)
        self.screen.blit(self.high_score_image, self.high_score_rect)
        self.screen.blit(self.level_image, self.level_rect)
        
        # To show the ship number left
        self.ships.draw(self.screen)
